Crane.



No. 627,890. Patented June 27, |899.

W. I. BABCOCK.

` CRANE.

(Application Bled Oct. 14, 1898.)

(No Model.)

2 Sheets-Sheet I.

C RA N E.

(Application led Oct. 14, 1898.)

2 Sheets-Sheet 2.

(No Model.)

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UNITED STATESd PATENT OFFICE.

WASHINGTON IRVING BABCOCK, OE CHICAGO, ILLINOIS, ASSIGNOR TO T HE WELLMAN-SEAVER ENGINEERING COMPANY, OF CLEVELAND, OHIO.

CRANE.

SPECIFICATION forming partvof Letters Patent No. 627,890, dated J' une 27, 1899. Application filed October 111, 1898. Serial No. 693,513. (No model.)

To @ZZ whom t may conccrn.'

Be it known that I, WASHINGTON IEvINe BABCOOK, a citizen of the United States, and a resident of Chicago, Illinois, have invented certain Im provelnen ts in Cranes, of which the following is a specification.

My invention consists of a certain improvement in the wharf-crane for which application for Letters Patent of the United States was iled by John W. Seaver and Samuel T.v

Wellman on the 21st day of July, 1898, Serial No. 686,522, the object of my improvement being t-o increase the range of lift of the structure therein set forth without detracting from any other of its valuable features. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure l is a side view of a wharf-crane of the character set forth in said application with my improvement applied thereto, the boom of the crane being shown partly extended. Fig. 2 is a similar view showing the boom contracted to the full extent, and Fig. 3 is a front View of the crane. c The crane forming the subject of the be.- fore-rnentioned invention of John W. Seaver and Samuel T. Wellman consists of a girder 1,.

supported at each end by a frame or legs 2 and carrying a sliding boom 3, on which are mounted, so as to be free to travel throughout the length of the same, one or more trolleys 4, each having suitable hoisting mechanism, the end frames or legs 2 of the crane being mounted upon Wheeled trucks and the boom running upon rollers 5 at the front end of the girder 1 and carrying at its inner end rollers 6 and 7, running, respectively, upon the upper and lower ian ges of the beams constituting the girder l, so as .to prevent tipping or tilting of the boom when the saine is run out.

In order to increase the range of the crane, I mount upon the front end of the boom 3 a derrick 8, consisting of opposite frames or legs rigidly secured at their lower ends to the beams constituting the boom, the legs of the derrick being by preference dared or forked at the lower end, thus forming separated supporting members, so that the trolley 4 can be run between the same out to the extreme end of the boom, as shown in Figs. l and 2, the upper portions of said legs or frames of the derrick being suitably braced, so as to impart to the structure the desired strength and rigidity. The derrick may be provided with special hoisting mechanism 9, or the tackle of the derrick may be operated by one of the trolleys 4: if the sameis suitably anchored to the derrick-frame or boom 3.

By mountingthe derrick upon the outer end of the boom I very materially increase the range of lift of the crane,so that it can be used for purposes for which as originally designed it was not adapted-as, for instance,'

for handling the masts of vessels, as shown in Iiig.v l, or for other work requiring a high lift, the mounting of the derrick on the sliding boom of the crane enabling the same to be claim and desire to secure by Letters Patent- 1. A crane having a hollow sliding boom which is capable of being projected and retracted, a hoisting-trolley running on the top of said boom and having a hoisting-chain depending through the same, and an upwardlyprojecting derrick located at the outer end of theboom and forked or flared at the lower end to form separated supporting members, between which the trolley can pass, substantially as specified.

2. A crane having a sliding boom which is capable of being projected and retracted, a hoisting-trolley running on said boom, and an upwardly-projecting derrick, located at the'outer end of the boom and having ahoisting device, independent of the trolley, substantially as specified.

In testimony whereof I have signed my WASHINGTON IRVING BABCOCK.

Witnesses: Y

B. W. WELLS, HENRY PENTON. 

